import { QueryResult } from "./QueryResult.js";
/**
 * Transaction interface - common methods for all database types
 * This interface ensures consistent transaction handling across MySQL and PostgreSQL
 */
export interface DatabaseTransaction {
    /**
     * Execute a query within the transaction
     */
    query<T = any>(text: string, params?: any[]): Promise<QueryResult<T>>;
    /**
     * Commit the transaction
     * This method should only be called once and marks the transaction as completed
     */
    commit(): Promise<void>;
    /**
     * Rollback the transaction
     * This method should be safe to call multiple times
     */
    rollback(): Promise<void>;
    /**
     * Check if the transaction has been completed (committed or rolled back)
     */
    isCompleted(): boolean;
    getDatabaseType(): 'postgresql' | 'mysql';
    supportsReturning(): boolean;
    adaptSql(sql: string): string;
    createInsertSql(tableName: string, columns: string[]): string;
    createUpdateSql(tableName: string, columns: string[]): string;
}
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